If you want, I can suggest you some books :

https://www.amazon.fr/Functional-Light-JavaScript-Pragmatic-Balanced-English-ebook/dp/B0787DBFKH

https://www.amazon.fr/Functional-Programming-Javascript-Luis-Atencio/dp/1617292826

https://www.amazon.fr/Parallel-Concurrent-Programming-Haskell-Marlow/dp/1449335942

https://www.manning.com/books/functional-programming-in-scala

They explain FP more in depth.